Ok I will explain it you remove the Mag. and maybe forget to eject a chambered round, don't say it can't or has not happened.
Then the trigger is pulled......BANG
The more one mess's with their Glock when it loaded with one in battery, the better the chances one is going to get hurt or hurt someone else.
Just do a Google search on Glocks being fired by accident.

Ok I will explain it you remove the Mag. and maybe forget to eject a chambered round, don't say it can't or has not happened.
Then the trigger is pulled......BANG
The more one mess's with their Glock when it loaded with one in battery, the better the chances one is going to get hurt or hurt someone else.
Just do a Google search on Glocks being fired by accident.

haha they undoubtedly happen, sadly. But I'm saying something a little different. I use my glock for HD and I keep it with none in the chamber but mag full. So should I go through the process of removing mag and checking empty and pulling trigger so hammer is forward, then putting mag back in. Or does it really not matter if the hammer is forward and can I just leave it back even though there's still not one in the chamber? I hope that made sense

I don't bother doing that with my XD ( the other tupperware). People are always warning against dry-firing your pistol too much; it seems like this would be just another wasted dry-fire.

If you are sure there is nothing in the chamber, why does hammer/striker position matter? I mean, you are just going to cock the striker when you chamber a round anyways. Of course, the XD has a loaded chamber indicator thingy; i'm not sure if the Glock does (would think so).

Yes, newer Glocks now have loaded chamber indicators. Dry firing a Glock will not harm the mechanism, unless you do it millions of times. It will not harm the firing pin spring to leave it compressed, as has been stated with the magazine springs, it does not hurt the springs to leave them loaded, the constand loading and unloading is what "may" weaken then over time. When I do annual inspections on my officers weapons, I compare the size of the spring in the weapon to a brand new spring. If the old spring has lost more than 2 coils, I replace it, at a whopping cost of $5.00.

I always have mine ready to rock and roll so it really doesn't apply to me. As for the average person, it really doesn't matter if the firing pin is released or under tension. You are going to have to put the firing pin under tension, when you load it anyway. By the way, Glocks don't have hammers, in the traditional sense.

I understand "firing pin on empty chamber/cylinder" on older weapons, but not on newer ones or LE/HD ones (Army MPS). Are you going to be able to tell the bad guy "Stop, wait a sec while I chamber a round, so I can shoot you." Then again, MP's have to put leashes on their guns so they don't lose them.